Spartin, Spastic paraplegia 20 protein, Trans-activated by hepatitis C virus core protein 1, SPG20, KIAA0610, TAHCCP1
SPG20 is a protein containing a MIT (MicrotubuleInteracting and Trafficking molecule) domain, and is implicated inregulating endosomal trafficking and mitochondria function. Theprotein localizes to mitochondria and partially co-localizes withmicrotubules. Stimulation with epidermal growth factor (EGF)results in protein translocation to the plasma membrane, and theprotein functions in the degradation and intracellular traffickingof EGF receptor. Multiple alternatively spliced variants, encodingthe same protein, have been identified. Mutations associated withthis gene cause autosomal recessive spastic paraplegia 20 (Troyersyndrome).